Ready to Receive State
Under Software Control, RTR Is Entered From...
...the Initialized state. Software transitions a QP from the Initialized state to the RTR state using the Modify QP verb call.
RTR State Operational Characteristics
When a QP is in the RTR state, it has the following operational characteristics:
WRs can be posted to the RQ.
Inbound message transfer request packets can be handled.
The first request packet of a Send operation or an RDMA Write With Immediate operation targeting the QP is processed normally by the next RQ WQE. If it's a RC or RD QP, this includes generating an Ack (or a Nak) for the request packet received.
Transition into the RTR state is only possible from the Initialized state via execution of the Modify QP verb. ...
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